Rubbing or polishing machine.



P. BAUKIN.

RUBBING OR POLISHING MACHINE.

APPLICATION FILED DEC. s, 1913. RENEWED Me. 23. 1914.

Patented. Apr. 13, 1915.

3 SHEETS-SHEBT 1.

P. BAUKIN.

nussme 0R POLISHING MACHINE.

APPLICATION FILED DEC. 8, I913. RENEWED DEC. 23,1914.

' Patented Apr. 113, 1915.

3 SHEETS-SHEET 2.

P. BAUKIN.

RVUBBING 0R POLISHING MACHINE. APPLICATION nusu DEC.B{I9I3. RENEWED DEC. 23, 1914.

Patented Apr. 13, 1915.

3 SHEETSSHEET 3.

PETER RANKIN, OJF JBELOI'I, WISCONSIN, ASSIGNOR TO 0. MA'ITISON MACHINE WONJKSQ OJE BELQIT, WISCONSIN, ACORPORATION OF WISCONSIN.

RUBBING: O, POLISHING IIIACJEEINE.

1,135ALO1.

Specification of Letters Patent.

ratenteddnr. is, rare.

application filed December 8, 1913, Serial No. 8Q5,206.- Renewed December 23, 1914. Serial No. 878,323.

To all whom it may concern Be it known thatI, PETER BAUKIN, a .citizen'of the United States, residing at Beloit, in the county of Itock and State of Wisconsin, have invented certain new and useful Improvements in Rubbing or Polishing Machines, of whichthe following is a specification.

This invention relates to machines for rubbing or polishing cabinet work, as, for example, the smoothing andpolishingof varnished surfaces of furniture.

In the process of finishing cabinet work,

I it is customary to rubthe varnished surfaces The rubbing machine is placed upon .the surafter each coat of varnish has been applied, the abrasive material consisting of finely ground pumice stone mixed with water.

face to be rubbed, and power being supplied, the rubbing pads are reciprocated.

The object of this invention is to provide means for preventing the water and pumice stone from being splashed or thrown i o the mechanism or guideways of the machine in the reciprocation of the rubbing pads.

In the accompanying drawings, Figure 1 is a side elevation of a rubbing or polishing machine embodying the features of my invention. Fig. 2 is an under side view of the machine. Fig. 3 is a horizontal sectional view taken in the plane of dotted line 33'of Fig. 1. Fig. 4c is a fragmental vertical section taken in the plane of dotted line 4 1 of Fig 3. Fig. 5 is a view similar to that'of lFig. 4:, but showing the parts in a :diflerent position. Fig. 6 is a fragmental inafter described. A Said body contains-the mechanism for reciprocating the rubbing pads and supports -an upper section which contains an electric motor 2 for driving said mechanism.

3 is a drive shaft. Upon the lower end of said shaft' is fixed a pinion-4 that meshes with two spur gear wheels 5 suitably supported in the body 1. Each. of'the gear;

Wheels 5 is connected by means of acrank pin 6 and a pitman 7 with slides 8. The

slides 8 are mounted for movement towardand away from' each other ina' dove-tail guideway- 9- formed-in the lower side of the 'body 1. The guideway 9 does not extend to 11 and the lower side of the body 1, I provide two parallel guard flanges 13 extending downwardly from the body 1 at opposite iaides of the path of movement of the memers 11.

In order that the guideway 9 shall be closed to the entrance of water or pumice stone from the space between the rubbing pads, each member 11 is provided with a guard extension 14 extending toward the other member 11, the guard extensions 14: overlapping in all positions of said members, as will be apparent from F igs. 4: and 5. The guard extensions 14: are of suflicient width to fill the space between the guard flanges 13.

In order to insure that water and abrasive material shall not enter the guideway 9 through the ends of the latter, each member 11 is provided with a guard extension '15 extending toward the adjacent end of the body 1, said extension beingof such length as to extend outwardly beyond the end wall 10 when the members 11 are in their innermost position- The guard extensions 15 are of such width as to fill the space between the guard flanges 13.

16 arethe pad holders. These holders may be secured to members 11 in any suitable way. Herein I have shown each holder as within a correspondingly shaped guideway 18 extending transversely of the members 11.

provided with a dove-tail guide 17 lying Relative movement between the pad holder I and its'attaching member 11 may be prevented in-any preferred way, as by means of set screws 19. I

' 20 indicates a pad of any suitable material removably secured to each pad holder 16 and covering the lower side of the latter.

cate toward and away from each other, thereby rubbingb the surface upon which the machine rests. he. reciprocation of the pads 10.5 In operation, the rotation of the drive shaft? causes the pad holders 16 to reciprocauses the mixture of water and pumice stone to be splashed, more or less, but the mixture cannot gain access to the guideway 9 or the mechanism located thereabove, since the lower side of said guideway is closed by the guard extensions 14 and 15 all posi{ tions of the pads.

I claim as my invention: 7

1. In a rubbing or polishing machine, a structure having a guideway opening upon its lower side; two slides in said guideway;

each other 1n all positions of said slides to close the lower side of the guideway; and

pads attached to the slides.

3. In a rubbing or polishing machine, a structure having a guideway in its lower side; two slides movable in said guideway; means for moving said slides; a member fixed to each slide; a guard extension on each member, said guard extensions extending toward each other and overlapping each other in all positions of the slides; padholders detachably connected to said members; and pads attached to the pad-holders.

4. In a rubbing .or polishing machine, a

b structure having a longitudinal guideway in its lower side, said guideway stopping short of the ends of the structure; two slides in said guideway; means for moving said slides; a guard extension connected to and extending outwardly from each slide and underlying said structure, said extensions being of sufficient length to extend beyond the ends of the guideway when said slides are in their innermost position; and rubbing pads connected to said slides.

5. In a rubbing or polishing machine, a structure having a guideway in its lower side, said guideway stopping shortof the ends of the structure; two slides movable in said guideway; means for reciprocating said slides; a member fixed to each slide; a guard extension on each member, said guard extensions extending toward each other and overlapping each other in all positions of the slides; a guard extension extending outwardly from eachlmember and underlying said structure, said last mentioned extensions being of sufficient length to extend beyond the ends of the guideway in all positions of the slides; a guard flange extending downwardly. from the structure at each side of the path of movement of the members; pad-holders detachably connected to the members; and pads attached to the padholders.

6. In a surfacing machine, the combination of a structure having an open lower side, a pair of surfacing elements mounted for reciprocation along said lower side, means for driving said elements, and horizontal guard extensions moving with said elements for closing the said open lower side of the structure. I

7. In a surfacing machine, a surfacing element having horizontal guard members projecting from opposite sides thereof and adapted to obstruct surfacing material which splashes up.

8. In a surfacing machine, the combination of a structure having an open lower side, a pair of surfacing elements mounted on said structure to reciprocate toward and away from each other, means for driving said elements, guard extensions on the inner or adjacent sides of said elements projecting toward each other and arranged to overlap, and guards'on the outer sides of said elements adapted to slidably cotiperate with parts at opposite ends of said structure.

9. In a surfacing machine, the combination of a structure having an open lower side, a pair of surfacing elements mounted on said structure to reciprocate toward and away from each other, means positioned between said elements and extending from side to side of the structure and adapted to overlap and coiiperate to maintain the I mid-portion of the said open side closed at all times, and horizontal guard members on the outer sides of said elements arranged to coact with parts on opposite ends of said structure for the purpose described.

10. In a surfacing machine, the combination of a structure. having an open lower side, a pair of surfacing elements by which the machine is supported upon the article to be finished, said elements being mounted adjacent to said lower side to reciprocate toward and away from each other, means for driving said elements, and overlapping horizontal guard devices between said elements for closing the open lower side of the machine.

In testimony whereof I afiix my signature in presence of two witnesses.

PETER BAUKIN.

Witnesses:

J. W. DOWNING, A. D. QUIXLEY. 

